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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "extensions/common/extension_resource.h" | 5 #include "extensions/common/extension_resource.h" |
| 6 | 6 |
| 7 #include "base/file_util.h" | 7 #include "base/file_util.h" |
| 8 #include "base/logging.h" | 8 #include "base/logging.h" |
| 9 #include "base/threading/thread_restrictions.h" | 9 #include "base/threading/thread_restrictions.h" |
| 10 | 10 |
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| 45 return full_resource_path_; | 45 return full_resource_path_; |
| 46 } | 46 } |
| 47 | 47 |
| 48 // static | 48 // static |
| 49 base::FilePath ExtensionResource::GetFilePath( | 49 base::FilePath ExtensionResource::GetFilePath( |
| 50 const base::FilePath& extension_root, | 50 const base::FilePath& extension_root, |
| 51 const base::FilePath& relative_path, | 51 const base::FilePath& relative_path, |
| 52 SymlinkPolicy symlink_policy) { | 52 SymlinkPolicy symlink_policy) { |
| 53 // We need to resolve the parent references in the extension_root | 53 // We need to resolve the parent references in the extension_root |
| 54 // path on its own because IsParent doesn't like parent references. | 54 // path on its own because IsParent doesn't like parent references. |
| 55 base::FilePath clean_extension_root(extension_root); | 55 base::FilePath clean_extension_root(extension_root.AsAbsolute()); |
| 56 if (!file_util::AbsolutePath(&clean_extension_root)) | 56 if (clean_extension_root.empty()) |
| 57 return base::FilePath(); | 57 return base::FilePath(); |
| 58 | 58 |
| 59 base::FilePath full_path = clean_extension_root.Append(relative_path); | 59 base::FilePath full_path = clean_extension_root.Append(relative_path); |
| 60 | 60 |
| 61 // If we are allowing the file to be a symlink outside of the root, then the | 61 // If we are allowing the file to be a symlink outside of the root, then the |
| 62 // path before resolving the symlink must still be within it. | 62 // path before resolving the symlink must still be within it. |
| 63 if (symlink_policy == FOLLOW_SYMLINKS_ANYWHERE) { | 63 if (symlink_policy == FOLLOW_SYMLINKS_ANYWHERE) { |
| 64 std::vector<base::FilePath::StringType> components; | 64 std::vector<base::FilePath::StringType> components; |
| 65 relative_path.GetComponents(&components); | 65 relative_path.GetComponents(&components); |
| 66 int depth = 0; | 66 int depth = 0; |
| 67 | 67 |
| 68 for (std::vector<base::FilePath::StringType>::const_iterator | 68 for (std::vector<base::FilePath::StringType>::const_iterator |
| 69 i = components.begin(); i != components.end(); i++) { | 69 i = components.begin(); i != components.end(); i++) { |
| 70 if (*i == base::FilePath::kParentDirectory) { | 70 if (*i == base::FilePath::kParentDirectory) { |
| 71 depth--; | 71 depth--; |
| 72 } else if (*i != base::FilePath::kCurrentDirectory) { | 72 } else if (*i != base::FilePath::kCurrentDirectory) { |
| 73 depth++; | 73 depth++; |
| 74 } | 74 } |
| 75 if (depth < 0) { | 75 if (depth < 0) { |
| 76 return base::FilePath(); | 76 return base::FilePath(); |
| 77 } | 77 } |
| 78 } | 78 } |
| 79 } | 79 } |
| 80 | 80 |
| 81 // We must resolve the absolute path of the combined path when | 81 // We must resolve the absolute path of the combined path when |
| 82 // the relative path contains references to a parent folder (i.e., '..'). | 82 // the relative path contains references to a parent folder (i.e., '..'). |
| 83 // We also check if the path exists because the posix version of AbsolutePath | 83 // We also check if the path exists because the posix version of AsAbsolute |
| 84 // will fail if the path doesn't exist, and we want the same behavior on | 84 // will fail if the path doesn't exist, and we want the same behavior on |
| 85 // Windows... So until the posix and Windows version of AbsolutePath are | 85 // Windows... So until the posix and Windows version of AsAbsolute are |
| 86 // unified, we need an extra call to PathExists, unfortunately. | 86 // unified, we need an extra call to PathExists, unfortunately. |
| 87 // TODO(mad): Fix this once AbsolutePath is unified. | 87 // TODO(mad): Fix this once AsAbsolute is unified. |
| 88 if (file_util::AbsolutePath(&full_path) && | 88 full_path = full_path.AsAbsolute(); |
| 89 file_util::PathExists(full_path) && | 89 if (file_util::PathExists(full_path) && |
| 90 (symlink_policy == FOLLOW_SYMLINKS_ANYWHERE || | 90 (symlink_policy == FOLLOW_SYMLINKS_ANYWHERE || |
| 91 clean_extension_root.IsParent(full_path))) { | 91 clean_extension_root.IsParent(full_path))) { |
| 92 return full_path; | 92 return full_path; |
| 93 } | 93 } |
| 94 | 94 |
| 95 return base::FilePath(); | 95 return base::FilePath(); |
| 96 } | 96 } |
| 97 | 97 |
| 98 // Unit-testing helpers. | 98 // Unit-testing helpers. |
| 99 base::FilePath::StringType ExtensionResource::NormalizeSeperators( | 99 base::FilePath::StringType ExtensionResource::NormalizeSeperators( |
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| 117 GetFilePath(); | 117 GetFilePath(); |
| 118 if (NormalizeSeperators(path.value()) == | 118 if (NormalizeSeperators(path.value()) == |
| 119 NormalizeSeperators(full_resource_path_.value())) { | 119 NormalizeSeperators(full_resource_path_.value())) { |
| 120 return true; | 120 return true; |
| 121 } else { | 121 } else { |
| 122 return false; | 122 return false; |
| 123 } | 123 } |
| 124 } | 124 } |
| 125 | 125 |
| 126 } // namespace extensions | 126 } // namespace extensions |
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